Improvement in low-water detecters-for steam-generators



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y wir@ UNITED STATES PATENT OEEIOEo THOMAS SAVILL, OE PHILADELPHIA, PENNSYLVANIA, AssIcNoE To c. JONES a OADBUEEOE SAME PLAGE.

IMPROVEMENT IN LOW-WATER DETECTERS -FOR STEAM-GENERATORS.

Specification forming part of Letters Patent No. 5,l79, dated September 18, 1866.

To all whom it may concern:

Be it known that I, THOMAS SAVILL, of Philadelphia, Pennsylvania, have invented an Improved Valve for Water-Gages; and I do hereby declare the following to be a full, clear,

and exact description ot' the same, reference being had to the'accompanying drawings, and to the letters ot' reference marked thereon.

My invention consists of a hollow spindle with cert-ain Valves and openin gs, in combination with a valve-chest with seats and an opening, the whole being constructed and operating substantially as described hereinafter, and forming a stop-valve, from which the sediment which is apt to collect in the valve-chests of water-gages can be readily discharged.

In order to enable others skilled in the art to make and use my invention, I will now proceed to describe its construction and operation.

0n reference to the accompanying drawings, which -form a part ot' this specification, Figure l is a sectional View of a valve for watergages with my improvement, and Fig. 2 the same with the operating parts in a position differing from that shown iu Fig. l.

Ais the valve-chest, into which screw thetwo branches B and B', and at the end of the chest is a tubular projection, a, to screw into the plate X ot' a stema-boiler below the low-water line of the same. Into the branch B projects the lower end ofthe usual glass tube Y, (shown by dotted lines,) the upper end ot' which is secured in the ordinary manner to a branch projectin g from a valve-chest communicating with the steam-space of the boiler. Through the branch B' extends a hollow7 screwed valvespindle, C, and on the outer end of the branch is a screw-cap, D, between which and the end of the branch is contined `any suitable packingmaterial. Near the outer end ofthe branch B is an opening, b, which communicates with a chamber, a2, in the *interior ot the branch, and in the hollow spindle are two holes, c c.

On the outer end of the spindle O is a suitable hand-wheel, E, and at the inner end are two valves, t t', the former being adapted to a conical seat, y, at the inner end of the branch B', and the latter to a conical seat, m, in the steam-chest A.

When itis desired to cleanse the valve-chest the spindle C is turned by means of the handwheel E until the Opening c communicates with the chamber x. when .the Water in the chest will rush through the opening c, through the spindle, through the opening c! and chamber x, from which it escapes through the opening b, the sediment collected in the bottom of the chest being carried off with the water. When the chest has been thus thoroughly cleaned the spindle is turned until the valve z' is brought against its seat y, when the further discharge of water will be prevented. Should it be necessary to remove the tube Y, the spindle is turned until the valve t is brought against its seat m, the communication between the upper valve-chest and the boiler being also closed, when the 'tube can be detached.

Although I prefer the use of the chamber m, it may, it' desirable, be dispensed with, the opening c being brought opposite the openin g b when the contents of the chest have to be discharged. p

I claim as my invent-ion and desire to secure by Letters Patent- The hollow spindle C, with its valves and .'openings, in combination with the valve-chest A, its valve-seats, and opening` b, the whole being constructed and operating substantially as and for the purpose specified.

In testimony whereofIhave signed my name tothis specification in the presence of two subscribing witnesses.

THOMAS SAVILL. Witnesses: v

CHARLES E. FOSTER, JOHN WHITE. y 

